The strongest of the Insecticons. He claims to have personally killed several members of The Wreckers.
Hardshell is an Insecticon, due to the fact he has stated killing Autobots in the past, he is clearly an Insecticon who was born on Cybertron and not one of the Earth-Born drones in the Insecticon hive,
Hardshell is loosely based on the G1 Insecticon Bombshell, he lacks Bombshell's mind-control ability and is superior in strength to the character Bombshell, in fact the only things the two characters have in common is that they are both Insecticons with a beetle alt-mode. The name Hardshell stems from a name Bombshell was often incorrectly referred to as in books and comics.
When sending out his forces to retrieve relics from the Iacon Database, Megatron asked the Insecticons who their strongest was, though the Insecticons claimed that no one individual is greater then another, Hardshell stood out as the physically superior in their ranks.
Soon, he and two other Insecticons are sent to retrieve the relic from a volcanic island where they come at odds with Bulkhead. In their first encounter, Hardshell severely wounded Bulkhead, but Bulkhead knocked Hardshell out. When Hardshell came to, he and the other Insecticons tracked Bulkhead by following the trail of Energon he was bleeding. Soon they discover that the relic Bulkhead has obtained is a cache of Tox-En. Wounded and sick from the effects of the Tox-En Bulkhead makes his way to the top of the volcano to dispose of the poison. But Hardshell is ready and he and the Insecticon Drones confront Bulkhead. Too weak to fight Bulkhead makes one last ditch effort and "lobs" the Tox-En at Hardshell, knocking him into the lava and the Tox-En with him. Though it looks as though the Tox-En was destroyed, Hardshell proved to live up to his name, and emerged unharmed from the lava. Bulkhead, who had his back turned and was making his way back to the Autobot base through a Groundbridge did not see this or Hardshell's attack coming, and is hit in the back by a missile fired by Hardshell, the force of which sends Bulkhead's body hurtling through the Groundbridge and back to Outpost Omega-1.
Hardshell will be a boss in the upcoming video-game Transformers: The Fall of Cybertron, a sequel to Transformers: The War for Cybertron. Both games directly are tied to the canon Transformers Prime universe known as the Aligned Continuity. Also appearing in the game are two other Insecticon leaders, one being Kickback.